<!DOCTYPE HTML>
<html>
<head>
<title>Canvas 2D Test: Red Box over Black Background</title>
<style type="text/css">
.nomargin {
  margin: 0px auto;
}
</style>
<script>
var g_swapsBeforeAck = 15;

function main()
{
  draw();
  waitForFinish();
}

function draw()
{
  var canvas = document.getElementById("c");
  var c2d = canvas.getContext("2d");
  c2d.clearRect(0, 0, canvas.width, canvas.height);
  c2d.fillStyle = "rgba(255, 0, 0, 0.5)";
  c2d.fillRect(50, 50, 100, 100);
}

function waitForFinish()
{
  if (g_swapsBeforeAck == 0) {
    domAutomationController.send("SUCCESS");
  } else {
    g_swapsBeforeAck--;
    document.getElementById('container').style.zIndex = g_swapsBeforeAck + 1;
    window.requestAnimationFrame(waitForFinish);
  }
}
</script>
</head>
<body onload="main()">
<div style="position:relative; width:200px; height:200px; background-color:black">
</div>
<div id="container" style="position:absolute; top:0px; left:0px">
<canvas id="c" width="200" height="200" class="nomargin"></canvas>
</div>
</body>
</html>
